PEABODY — With temperatures expected to reach or exceed 90 degrees for the next two days, Mayor Edward A. Bettencourt, Jr. has declared a heat emergency in Peabody effective Thursday, August 11 through Friday, August 12. The Peter A. Torigian Senior Center at 75R Central Street will be open for use as a cooling center for the public between noon and 7 p.m. both Thursday and Friday.